I'm buying a 7x14 snare drum and will be looking for a good hardshell case for it.
I emailed SKB - they said they don't make a "7x14" case but they have a 6.5x14 that may fit and this one:
SKB SKBD0814 Molded 8"x14" Snare Drum Case

Unfortunately there are no cases like this in the local drum shops for me to check out.

Has anyone here used this (8x14 tom/snare case) for a 7x14 snare drum? If so....are you happy with it?

I use all SKB Roto-X. You should be fine with the 6.5 for your 7. There is always a little wiggle room in the SKBs. I have not had this exact problem, but all of my cases have extra room which could easily accommodate an extra 1/2 inch.